Beehive the (lit% Prole° of the 'linter teeth in the Fruit Eating (or Omni vorene) null the I nneM!vnronm Dam', the stomach and intent ines present a remarkable corre sponding variance. The stomach of the former is very com plicated, and the int values very long in Pfrropus, for example, they IWO seven times as long as the body. In the latter the stomach Is very simple, and merely divided into the cardiac and pyloric portions, and the Intestines are not more than twice the length of the body. Thole differencen, together with that of the greater or less development of the tail, which is powerful, generally spanking, inn the true Insectivorous Bats, and either absent, aulimentary, or com paratively inefficient in the Fruit-Enters, which last do not require to turn so rapidly as the desultory flight of the prey of the former maker' it necessary for them to do, form, it is true, a marked distinction between the two groups; but we are, notwithstanding, of opinion that very few bats confine themselyee entirely to a vegetable diet.
The nervous system of Cheirovtrra Is fully developed. The of taste, sine% sight, and heariug are 'lento. The external earls very large In many of the species. The sense of touch, or a reuse analogous to it, intutt be highly developed. Spellanzaid—wo cannot compliment him on his humanity—extracted the eyes of bate and covered the empty sockets with leather ; yet, In this condition, they flew round his room, avoidiug the side" never striking against any thing, and flying out of the door without touching the door-case. In flying through a sewer which made a right angle, they turned at the proper point, though at a distance of two feet from the walls. They found their resting-place on a cornice, and flew through threadn, sus pended perpendicularly from the ceiling, without touching them, though scarcely farther apart than would admit their extended wings; and they avoided all obstacles with equal facility when the whole head was covered with varnish. But, according to the experiments of Carlisle, the British Long-Eared Bat was entirely at a loss, if, when blinded, its oars were stopped, for in that condition the blinded bats struck against the aides of the room, and seemed to be quite unaware of their situation. The following additional note to the English translation of Blumenbach however corroborates Spallanzani :—" Bats have been supposed to possess a peculiar power of perceiving external objects, without coming actually into contact with them. In their rapid and irregular flight, amidst various surrounding bodies, they never fly against them ; yet it does not seem that the senses of hearing, seeing, or smelling, serve them on these occasions, for they avoid any obstacles with equal certainty when the ear, eye, and nose, are closed. Hence naturalists have ascribed a sixth sense
to these animals ; it is probably analogous to that of touch. The nerves of the wing are large and numerous, and distributed in a minute plexus between the integuments. The impulse of the air against this part may probably be so modified by the objects near which the animal passes, as to indicate their situation and nature." Cutler, in his Legons d'Anatomie Comparee,' had, in a great measure, solved the mystery by observing, as is remarked in the note just quoted, that the whole surface of the flying membrane, on both sides, is endowed with extraordinary sensibility, and may be considered as one continuously expanded organ of touch. Nor is this the only peculiarity connected with the integument of the bats, for in the genus Noteris there exists a power of inflation to such a degree, that when the faculty is exerted the animal looks, according to Geoffrey, like a little balloon fitted with wings, a head, and feet. The sub cutaneous tissue is the part inflated, and as the skin adheres to the body at particular points only, the connection being by means of loose cellular membrane, spaces are left which can be filled with air at the will of the .Nyetcrizt, through the cheek pouches, which are perforated at the bottom so as to communicate with those spaces. When the Xycteris wishes to inflate its skin, it draws in its breath, closes its nostrils, and transmits the air through the perforations of the cheek pouches to the subcutaneous spaces, and the air is prevented from returning by the action of a sphincter, which closes those openings, and by valves of considerable size on the neck and back.
The organs of reproduction nearly approach those of the Quad rumana and man in many respects. In the female two teats are placed on the breast as in man and in the Quadrumana.
The Cheiroptera are widely spread over the globe. They are to be found in the Old and New World and in Australia. A tolerably temperate climate seems necessary for them, and the greatest develop ment of the form takes place in warm countries. Sir John Richardson (` Fauna Boreali-Americana ') notices two species, Vesper! We pruinosus (Say) caught at Cumberland House, on the Saskatchewan in 54° N. hat, and Vespsrti1iotubulatwa (Say), which he observes is the most common species near the eastern base of the Rocky Mountains on the upper branches of the Saskatchewan and Peace River.